Did you disconnect a bank feed?  If you entered it in QBO, it should be there.  If you clicked undo in the banking screen, the transactions should show in the bank feed window again.

Resolution for 'bank feed window again issue: 'I was trying to undo a couple banking transactions and lost 2 months of posted data. Anyway to reset to yesterday?' available: Yes.

The bank feed window again issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the bank feed window again issue yourself by looking for a resolution described in the article. If it is a complex bank feed window again issue or you are unable to solve the issue, you may contact us by clicking here or by using other bank feed window again support options.

For more information about resolving issues related to bank feed window again in Quickbooks/QBO or to get support for the issue 'I was trying to undo a couple banking transactions and lost 2 months of posted data. Anyway to reset to yesterday?', click the link below: